GPS Receiver User Manual

KLN 35A Pilot’s Guide Advanced GPS Operation
4-19
Effective Date 5/95006-08791-0000 Rev 0
Advanced GPS Operation
Chapter 4
2.Enter the altitude indicated on the
aircraft’s altimeter (Ind:) to the
nearest hundred feet by using the
right inner knob to select the
desired value (figure 4-66).
3.Use the right outer knob to move
the cursor to the Baro:field, and
then use the right inner knob to
enter the current altimeter setting
(figure 4-67). The pressure alti-
tude (Prs) is now displayed.
NOTE: The altimeter baro set units may be changed between inch-
es, millibars and hectopascals on the SET 8 page (see section 3.15).
4.3.4. THE CALCULATOR 4 (CAL 4) PAGE
The CAL 4 page is used to determine density altitude
To calculate the density altitude:
1.Turn on the cursor (B).
2.The pressure altitude (Prs:) displayed will be either the last
entered pressure altitude on this page, or the last calculated
pressure altitude from the CAL 3 page. If you desire to change it,
enter the current pressure altitude to the nearest hundred feet by
using the right inner knob (figure 4-68).
3.Use the right outer knob to move
the cursor to the first Temp:field,
and then use the right inner and
outer knobs to enter the outside
air temperature (degrees Celsius)
(figure 4-69). The first digit of the
temperature is either “0” if the
temperature is above zero or “-” if
the temperature is below zero.
For maximum accuracy, the static
air temperature should be
entered. This is the temperature
of air without the effect of heating
due to the aircraft’s movement through the air. For the airspeeds
of most piston aircraft, the difference between static air tempera-
ture and the observed air temperature (or “total air temperature”)
is negligible. The density altitude (Den) is now displayed.
APT VOR NDB SUP ACT NAV FPL CAL SET OTH
åå.ånm PRESSURE ALT
åååååå Ind: 05000ft
>Leg Baro: 29.74"
CRSR Prs 05200ft
Figure 4-67
APT VOR NDB SUP ACT NAV FPL CAL SET OTH
åå.ånm PRESSURE ALT
åååååå Ind: 05000ft
>Leg Baro: 30.03"
CRSR Prs 04900ft
Figure 4-66
APT VOR NDB SUP ACT NAV FPL CAL SET OTH
åå.ånm DENSITY ALT
åååååå Prs: 05500ft
>Leg Temp: 010°C
CRSR Den 06200ft
Figure 4-68
APT VOR NDB SUP ACT NAV FPL CAL SET OTH
åå.ånm DENSITY ALT
åååååå Prs: 05500ft
>Leg Temp: 006°C
CRSR Den 05700ft
Figure 4-69